Improvement in propellers



dnited States strut @Wire 'Letters Patent No. 106,824, dated August 30,1870,

IMPROVEMENT IN PROPELLERS.

The Schedule referred to in these Letters Patent and mak-mg part of thesame.

To all whom it m'ay concer-n Be it known that we, Lewis HOWARD an'dCHARLES HOWARD, of Vif-atkins, in the county ot Schuyler and State ofNew York, have invented a new and useful Improvement in Canal-Boats;audwe' do hereby declare the following to be'a full, clear, and exactdescription of the same, referenoebeing had to the accompanyingdrawingmaking a part of this specification, in \vhich- Figure l is alongitudinal vertical section, and

Figure 2 is a horizontal transverse section.

This invention relates to a canal-boat of the kind that is propelled bya screw, located in a chamber within the boat, said screw being rotatedb v an engine carried iu the boat.

- The invention consists o f a bar placed at the stern of thehoat,'across the rear end of the chamber thatl contains the propeller',said har serving as a brace between the sides of the chamber; also as aguide for the vertical sliding post in which is supported the rear endof the propeller-shaft, and also as a support for thelowcr end of therudder.

In the drawing- A isa section oi' a canal-boat;

a, the chamber in the -stern of the boat;

b, the propeller-shaft, placed lengthwise of -the chamber;

o, the vertical post, in an oritice in' which the rear end-of thepropeller-shaft is supported, said post extending upward through the topof the chamber a., and passing through a nut, by turning which thepostmay be raised or lowered; and

c is the rudder.

In the foregoing arrangement there is nothing new.

B is the bar, placed at the stern of the boat, crosswise of the chambera., and serving as a brace between the sides of the same.

, Through an orifice in the `bar B the vertical post c passes, so thatthe bar serves as a guide to the post. In an offset, f, of the bar B,the rudder-pintle t' is stepped, so that the bar serves as al supportfor the rudder. a

Having thus described our invention,

What we clairn as new, and desire to vsecure by Letters Patent, is-

The har B, placed across the rear end ofthe cham,- ber a, as described,and for the purposes set forth.

LEWIS HOWARD. CHARLES HOWARDI fitnesses :V

M. F. Roon, WILLIAM ToT'rEN.

